syntax = "proto3";

package falcon.brpc_io;

option cc_generic_services = true;

service RemoteIOService {
    rpc OpenFile(OpenRequest) returns(OpenReply) {}
    rpc CloseFile(CloseRequest) returns(ErrorCodeOnlyReply) {}
    rpc ReadFile(ReadRequest) returns(ErrorCodeOnlyReply) {}
    rpc ReadSmallFile(ReadSmallFileRequest) returns(ErrorCodeOnlyReply) {}
    rpc WriteFile(WriteRequest) returns(WriteReply) {}
    rpc DeleteFile(DeleteRequest) returns(ErrorCodeOnlyReply) {}
    rpc StatFS(StatFSRequest) returns(StatFSReply) {}
    rpc TruncateOpenInstance(TruncateOpenInstanceRequest) returns(ErrorCodeOnlyReply) {}
    rpc TruncateFile(TruncateFileRequest) returns(ErrorCodeOnlyReply) {}
    rpc CheckConnection(CheckConnectionRequest) returns(ErrorCodeOnlyReply) {}
    rpc StatCluster(StatClusterRequest) returns(StatClusterReply) {}
}

message StatClusterRequest {
    bool scatter = 1;
    int32 node_id = 2;
}

message StatClusterReply {
    repeated int64 stats = 1;
    int32 error_code = 2;
}

message CheckConnectionRequest {
    
}

message ErrorCodeOnlyReply {
    int32 error_code = 1;
}

message OpenRequest{
    string path = 1;
    fixed64 inode_id = 2;
    int32 oflags = 3;
    fixed64 size = 4;
    bool node_fail = 5;
}

message OpenReply {
    int32 error_code = 1;
    fixed64 physical_fd = 2;
}

message CloseRequest {
    fixed64 physical_fd = 1;
    bool flush = 2;
    bool sync = 3;
    fixed64 offset = 4;
}

message ReadRequest {
    string path = 1;
    fixed64 physical_fd = 2;
    int32 read_size = 3;
    fixed64 offset = 4;
}

message ReadSmallFileRequest {
    string path = 1;
    fixed64 inode_id = 2;
    fixed64 read_size = 3;
    int32 oflags = 4;
    bool node_fail = 5;
}

message WriteRequest {
    fixed64 physical_fd = 1;
    fixed64 offset = 2;
}

message WriteReply {
    int32 error_code = 1;
    fixed64 write_size = 2;
}

message DeleteRequest {
    string path = 1;
    fixed64 inode_id = 2;
    int32 node_id = 3;    
}

message StatFSRequest {
    string path = 1;
}

message StatFSReply {
    int32 error_code = 1;
    fixed64 fblocks = 2;
    fixed64 fbfree = 3;
    fixed64 fbavail = 4;
    fixed64 ffiles = 5;
    fixed64 fffree = 6;
}

message TruncateOpenInstanceRequest {
    fixed64 physical_fd = 1;
    fixed64 size = 2;
}

message TruncateFileRequest {
    fixed64 physical_fd = 1;
    fixed64 size = 2;
}